1139735Simp/*- 2129198Scognet * Copyright 1998 Massachusetts Institute of Technology 3129198Scognet * 4129198Scognet * Permission to use, copy, modify, and distribute this software and 5129198Scognet * its documentation for any purpose and without fee is hereby 6129198Scognet * granted, provided that both the above copyright notice and this 7129198Scognet * permission notice appear in all copies, that both the above 8129198Scognet * copyright notice and this permission notice appear in all 9129198Scognet * supporting documentation, and that the name of M.I.T. not be used 10129198Scognet * in advertising or publicity pertaining to distribution of the 11129198Scognet * software without specific, written prior permission. M.I.T. makes 12129198Scognet * no representations about the suitability of this software for any 13129198Scognet * purpose. It is provided "as is" without express or implied 14129198Scognet * warranty. 15182934Sraj * 16129198Scognet * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17129198Scognet * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18129198Scognet * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19129198Scognet * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20129198Scognet * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21129198Scognet * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22129198Scognet * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23129198Scognet * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24129198Scognet * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25129198Scognet * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26129198Scognet * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27129198Scognet * SUCH DAMAGE. 28129198Scognet * 29129198Scognet */ 30129198Scognet 31129198Scognet/* 32129198Scognet * This code implements a `root nexus' for Arm Architecture 33129198Scognet * machines. The function of the root nexus is to serve as an 34129198Scognet * attachment point for both processors and buses, and to manage 35129198Scognet * resources which are common to all of them. In particular, 36129198Scognet * this code implements the core resource managers for interrupt 37129198Scognet * requests, DMA requests (which rightfully should be a part of the 38129198Scognet * ISA code but it's easier to do it here for now), I/O port addresses, 39129198Scognet * and I/O memory address space. 40129198Scognet */ 41129198Scognet 42129198Scognet#include <sys/cdefs.h> 43129198Scognet__FBSDID("$FreeBSD$"); 44129198Scognet 45129198Scognet#include <sys/param.h> 46129198Scognet#include <sys/systm.h> 47129198Scognet#include <sys/bus.h> 48129198Scognet#include <sys/kernel.h> 49129198Scognet#include <sys/malloc.h> 50129198Scognet#include <sys/module.h> 51129198Scognet#include <machine/bus.h> 52129198Scognet#include <sys/rman.h> 53129198Scognet#include <sys/interrupt.h> 54129198Scognet 55129198Scognet#include <machine/vmparam.h> 56129198Scognet#include <machine/pcb.h> 57129198Scognet#include <vm/vm.h> 58129198Scognet#include <vm/pmap.h> 59129198Scognet 60129198Scognet#include <machine/resource.h> 61129198Scognet#include <machine/intr.h> 62129198Scognet 63266000Sian#include "opt_platform.h" 64266000Sian 65266000Sian#ifdef FDT 66266079Sian#include <dev/fdt/fdt_common.h> 67266000Sian#include <machine/fdt.h> 68266079Sian#include "ofw_bus_if.h" 69266160Sian#endif 70266160Sian 71129198Scognetstatic MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 72129198Scognet 73129198Scognetstruct nexus_device { 74129198Scognet struct resource_list nx_resources; 75129198Scognet}; 76129198Scognet 77129198Scognet#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 78129198Scognet 79129198Scognetstatic struct rman mem_rman; 80129198Scognet 81129198Scognetstatic int nexus_probe(device_t); 82129198Scognetstatic int nexus_attach(device_t); 83129198Scognetstatic int nexus_print_child(device_t, device_t); 84212413Savgstatic device_t nexus_add_child(device_t, u_int, const char *, int); 85129198Scognetstatic struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 86182934Sraj u_long, u_long, u_long, u_int); 87129198Scognetstatic int nexus_activate_resource(device_t, device_t, int, int, 88182934Sraj struct resource *); 89266070Sianstatic int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 90266070Sian enum intr_polarity pol); 91266000Sianstatic int nexus_deactivate_resource(device_t, device_t, int, int, 92266000Sian struct resource *); 93266000Sian 94182934Srajstatic int nexus_setup_intr(device_t dev, device_t child, struct resource *res, 95182934Sraj int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep); 96182934Srajstatic int nexus_teardown_intr(device_t, device_t, struct resource *, void *); 97147166Scognet 98266079Sian#ifdef FDT 99266079Sianstatic int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, 100266128Sian int icells, pcell_t *intr); 101266079Sian#endif 102266079Sian 103129198Scognetstatic device_method_t nexus_methods[] = { 104129198Scognet /* Device interface */ 105129198Scognet DEVMETHOD(device_probe, nexus_probe), 106129198Scognet DEVMETHOD(device_attach, nexus_attach), 107129198Scognet /* Bus interface */ 108129198Scognet DEVMETHOD(bus_print_child, nexus_print_child), 109129198Scognet DEVMETHOD(bus_add_child, nexus_add_child), 110129198Scognet DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 111129198Scognet DEVMETHOD(bus_activate_resource, nexus_activate_resource), 112266070Sian DEVMETHOD(bus_config_intr, nexus_config_intr), 113266000Sian DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 114129198Scognet DEVMETHOD(bus_setup_intr, nexus_setup_intr), 115147166Scognet DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 116266079Sian#ifdef FDT 117266079Sian DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), 118266079Sian#endif 119129198Scognet { 0, 0 } 120129198Scognet}; 121129198Scognet 122266000Sianstatic devclass_t nexus_devclass; 123129198Scognetstatic driver_t nexus_driver = { 124129198Scognet "nexus", 125129198Scognet nexus_methods, 126129198Scognet 1 /* no softc */ 127129198Scognet}; 128270075SianEARLY_DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0, 129270075Sian BUS_PASS_BUS + BUS_PASS_ORDER_EARLY); 130129198Scognet 131129198Scognetstatic int 132129198Scognetnexus_probe(device_t dev) 133129198Scognet{ 134209129Sraj 135129198Scognet device_quiet(dev); /* suppress attach message for neatness */ 136182934Sraj 137209129Sraj return (BUS_PROBE_DEFAULT); 138129198Scognet} 139129198Scognet 140129198Scognetstatic int 141129198Scognetnexus_attach(device_t dev) 142129198Scognet{ 143182934Sraj 144209232Sraj mem_rman.rm_start = 0; 145221218Sjhb mem_rman.rm_end = ~0ul; 146209232Sraj mem_rman.rm_type = RMAN_ARRAY; 147209232Sraj mem_rman.rm_descr = "I/O memory addresses"; 148221218Sjhb if (rman_init(&mem_rman) || rman_manage_region(&mem_rman, 0, ~0)) 149209232Sraj panic("nexus_probe mem_rman"); 150209232Sraj 151129198Scognet /* 152129198Scognet * First, deal with the children we know about already 153129198Scognet */ 154129198Scognet bus_generic_probe(dev); 155129198Scognet bus_generic_attach(dev); 156182934Sraj 157182934Sraj return (0); 158129198Scognet} 159129198Scognet 160129198Scognetstatic int 161129198Scognetnexus_print_child(device_t bus, device_t child) 162129198Scognet{ 163129198Scognet int retval = 0; 164182934Sraj 165129198Scognet retval += bus_print_child_header(bus, child); 166235907Sgber retval += printf("\n"); 167182934Sraj 168129198Scognet return (retval); 169129198Scognet} 170129198Scognet 171129198Scognetstatic device_t 172212413Savgnexus_add_child(device_t bus, u_int order, const char *name, int unit) 173129198Scognet{ 174182934Sraj device_t child; 175129198Scognet struct nexus_device *ndev; 176182934Sraj 177129198Scognet ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 178129198Scognet if (!ndev) 179182934Sraj return (0); 180129198Scognet resource_list_init(&ndev->nx_resources); 181129198Scognet 182129198Scognet child = device_add_child_ordered(bus, order, name, unit); 183182934Sraj 184129198Scognet /* should we free this in nexus_child_detached? */ 185129198Scognet device_set_ivars(child, ndev); 186182934Sraj 187182934Sraj return (child); 188129198Scognet} 189129198Scognet 190129198Scognet 191129198Scognet/* 192129198Scognet * Allocate a resource on behalf of child. NB: child is usually going to be a 193129198Scognet * child of one of our descendants, not a direct child of nexus0. 194129198Scognet * (Exceptions include footbridge.) 195129198Scognet */ 196129198Scognetstatic struct resource * 197129198Scognetnexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 198182934Sraj u_long start, u_long end, u_long count, u_int flags) 199129198Scognet{ 200129198Scognet struct resource *rv; 201129198Scognet struct rman *rm; 202129198Scognet int needactivate = flags & RF_ACTIVE; 203129198Scognet 204129198Scognet switch (type) { 205129198Scognet case SYS_RES_MEMORY: 206266000Sian case SYS_RES_IOPORT: 207129198Scognet rm = &mem_rman; 208129198Scognet break; 209182934Sraj 210129198Scognet default: 211182934Sraj return (0); 212129198Scognet } 213129198Scognet 214129198Scognet rv = rman_reserve_resource(rm, start, end, count, flags, child); 215129198Scognet if (rv == 0) 216182934Sraj return (0); 217129198Scognet 218157891Simp rman_set_rid(rv, *rid); 219182934Sraj rman_set_bushandle(rv, rman_get_start(rv)); 220182934Sraj 221129198Scognet if (needactivate) { 222129198Scognet if (bus_activate_resource(child, type, *rid, rv)) { 223129198Scognet rman_release_resource(rv); 224182934Sraj return (0); 225129198Scognet } 226129198Scognet } 227182934Sraj 228182934Sraj return (rv); 229129198Scognet} 230129198Scognet 231266000Sianstatic int 232266070Siannexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 233266070Sian enum intr_polarity pol) 234266070Sian{ 235266070Sian int ret = ENODEV; 236266070Sian 237266070Sian if (arm_config_irq) 238266070Sian ret = (*arm_config_irq)(irq, trig, pol); 239266070Sian 240266070Sian return (ret); 241266070Sian} 242266070Sian 243266070Sianstatic int 244266000Siannexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, 245266000Sian driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep) 246266000Sian{ 247266000Sian int irq; 248129198Scognet 249266000Sian if ((rman_get_flags(res) & RF_SHAREABLE) == 0) 250266000Sian flags |= INTR_EXCL; 251266000Sian 252266000Sian for (irq = rman_get_start(res); irq <= rman_get_end(res); irq++) { 253266000Sian arm_setup_irqhandler(device_get_nameunit(child), 254266000Sian filt, intr, arg, irq, flags, cookiep); 255266000Sian arm_unmask_irq(irq); 256266000Sian } 257266000Sian return (0); 258266000Sian} 259266000Sian 260129198Scognetstatic int 261266000Siannexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 262266000Sian{ 263266000Sian 264266000Sian return (arm_remove_irqhandler(rman_get_start(r), ih)); 265266000Sian} 266266000Sian 267266000Sian 268266000Sianstatic int 269129198Scognetnexus_activate_resource(device_t bus, device_t child, int type, int rid, 270182934Sraj struct resource *r) 271129198Scognet{ 272266079Sian int err; 273266079Sian bus_addr_t paddr; 274266079Sian bus_size_t psize; 275266079Sian bus_space_handle_t vaddr; 276266079Sian 277266079Sian if ((err = rman_activate_resource(r)) != 0) 278266079Sian return (err); 279266079Sian 280129198Scognet /* 281129198Scognet * If this is a memory resource, map it into the kernel. 282129198Scognet */ 283266000Sian if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 284266079Sian paddr = (bus_addr_t)rman_get_start(r); 285266079Sian psize = (bus_size_t)rman_get_size(r); 286266000Sian#ifdef FDT 287266079Sian err = bus_space_map(fdtbus_bs_tag, paddr, psize, 0, &vaddr); 288266079Sian if (err != 0) { 289266079Sian rman_deactivate_resource(r); 290266079Sian return (err); 291266079Sian } 292266000Sian rman_set_bustag(r, fdtbus_bs_tag); 293266000Sian#else 294266079Sian vaddr = (bus_space_handle_t)pmap_mapdev((vm_offset_t)paddr, 295266079Sian (vm_size_t)psize); 296266079Sian if (vaddr == 0) { 297266079Sian rman_deactivate_resource(r); 298266079Sian return (ENOMEM); 299266079Sian } 300266000Sian rman_set_bustag(r, (void *)1); 301266000Sian#endif 302266079Sian rman_set_virtual(r, (void *)vaddr); 303266079Sian rman_set_bushandle(r, vaddr); 304129198Scognet } 305266079Sian return (0); 306129198Scognet} 307129198Scognet 308266000Sianstatic int 309266000Siannexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 310266079Sian struct resource *r) 311266000Sian{ 312266079Sian bus_size_t psize; 313266079Sian bus_space_handle_t vaddr; 314266000Sian 315266079Sian psize = (bus_size_t)rman_get_size(r); 316266079Sian vaddr = rman_get_bushandle(r); 317266079Sian 318266079Sian if (vaddr != 0) { 319266079Sian#ifdef FDT 320266079Sian bus_space_unmap(fdtbus_bs_tag, vaddr, psize); 321266079Sian#else 322266079Sian pmap_unmapdev((vm_offset_t)vaddr, (vm_size_t)psize); 323266079Sian#endif 324266079Sian rman_set_virtual(r, NULL); 325266079Sian rman_set_bushandle(r, 0); 326266079Sian } 327266079Sian 328266079Sian return (rman_deactivate_resource(r)); 329266000Sian} 330266000Sian 331266079Sian#ifdef FDT 332266079Sianstatic int 333266128Siannexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, 334266128Sian pcell_t *intr) 335266079Sian{ 336266079Sian fdt_pic_decode_t intr_decode; 337273671Sian phandle_t intr_parent; 338266079Sian int i, rv, interrupt, trig, pol; 339266079Sian 340273671Sian intr_parent = OF_node_from_xref(iparent); 341266128Sian for (i = 0; i < icells; i++) 342266128Sian intr[i] = cpu_to_fdt32(intr[i]); 343266079Sian 344266079Sian for (i = 0; fdt_pic_table[i] != NULL; i++) { 345266079Sian intr_decode = fdt_pic_table[i]; 346273671Sian rv = intr_decode(intr_parent, intr, &interrupt, &trig, &pol); 347266079Sian 348266079Sian if (rv == 0) { 349266079Sian /* This was recognized as our PIC and decoded. */ 350266079Sian interrupt = FDT_MAP_IRQ(intr_parent, interrupt); 351266079Sian return (interrupt); 352266079Sian } 353266079Sian } 354266079Sian 355266079Sian /* Not in table, so guess */ 356266128Sian interrupt = FDT_MAP_IRQ(intr_parent, fdt32_to_cpu(intr[0])); 357266079Sian 358266079Sian return (interrupt); 359266079Sian} 360266079Sian#endif 361266079Sian 362